@misc{indiciae539980bbcae4,
  title = {Squeezed light from a coherently pumped four-level laser.},
  author = {TC Ralph and CM Savage},
  year = {1991},
  doi = {10.1103/physreva.44.7809},
  url = {https://pubmed.ncbi.nlm.nih.gov/9905917/},
  note = {Source identifier: 9905917}
}